You are right, but 《209P bogie》 is one of the main bogies for passenger cars with a speed of 140km/h on China's domestic trunk line independently developed by CSR Nanjing Puzhen Vehicle Co., Ltd. Most of the bogies are assembled in a fantasy bus called 「25G」, where the person selected by the maintenance workshop will be awarded a「flashlight」 to guide the power of the wrench. You will play a mysterious role named 「Inspector」. During the overhaul, you will encounter parts with different personalities and unique abilities, and work with them to troubleshoot hidden dangers and prevent accidents from happening—at the same time, gradually discover the 「bolt break」 the truth.